AV&V™ High Performance Valve Spring Kits (6MM) High Performance Valve Spring kits – Beehive Manufactured from ultra clean high silicon/vanadium Kobe wire alloy. In Kit Number Spring part Number Max. Recommended Lift Seat Pressure Open Pressure (lbs@inch) Coil Bing Height O.D. I.D. TYPE Retainer Valves Locks VSK8000TGS7000.580" 75 lbs @ 1.570" 250 lbs @ .990" .855" 1.100" .750" Beehive springs R8000 VL6MMTGC Retainers Part number Material Traitement Angle In Kit Number R80004140 Chromoly steel Black Oxyde 7° VSK8000TG Valve Locks Part number Material Groove Usage Angle In Kit Number VL6MMTGCSteel Triple Beehive spring Kit 7° VSK7000TG